Agonopterix nanatella aridella (Mann, 1869)
Full depth, little contracted and very transparant blotch, mostly limited to the leaf tip. Most frass is ejected; what remains in the mine are unusually large grains. Not all larvae mine, some live free. Pupation external.
Larvae in April, May (Hering, 1957a).
distribution within Europe
Amsel & Hering (1933a) mention aridella from Sardinia; Hering (1957a) writes “southern Europe”. The Fauna Europaea (2010) accepts aridella as a valid subspecies of nanatella, but has no information about its distribution.
See also Agonopterix nanatella. Whether indeed the one subspecies is limited to Carlina, the other to Cirsium, remains to be established.
Amsel & Hering (1933a), Hering (1957a).